meson: pass -fno-builtin when testing whether stpcpy is a builtin

In https://bugzilla.gnome.org/show_bug.cgi?id=794555 the tests for
posix_memalign and stpcpy were extended to catch the case where
the compiler provides an incomplete builtin.

Under MSYS2 the example code still compiles and links while the real usage
of stpcpy fails to build. To prevent the MSYS2 gcc from using the builtin
versions pass -fno-builtin.

https://bugzilla.gnome.org/show_bug.cgi?id=793729

1 files changed, 14 insertions, 2 deletions

diff --git a/meson.build b/meson.build
index cf8c69b25..8c48bf55a 100644
--- a/meson.build
+++ b/meson.build
@@ -453,12 +453,21 @@ foreach f : functions
   endif
 endforeach
 
+if cc.get_id() == 'gcc' or cc.get_id() == 'clang'
+    no_builtin_args = cc.get_supported_arguments(['-fno-builtin'])
+else
+    no_builtin_args = []
+endif
+
 # Check that stpcpy() is not a builtin
 if cc.links('''#include <string.h>
                int main (int argc, char ** argv) {
                  char p[10];
                  return stpcpy (p, argv[0]) != NULL;
-               }''', name : 'stpcpy() is not a builtin')
+               }
+            ''',
+            args : no_builtin_args,
+            name : 'stpcpy() is not a builtin')
   glib_conf.set('HAVE_STPCPY', 1)
 endif
 
@@ -467,7 +476,10 @@ if cc.links('''#include <stdlib.h>
                int main (int argc, char ** argv) {
                  void *p;
                  return posix_memalign (&p, 16, argc);
-               }''', name : 'posix_memalign() is not a builtin')
+               }
+            ''',
+            args : no_builtin_args,
+            name : 'posix_memalign() is not a builtin')
   glib_conf.set('HAVE_POSIX_MEMALIGN', 1)
 endif